How did you get " a - 1 = a + 1 " ?
I don't see how the hell do you jump from a-1=(a-1)*(a+1) to a-1=a+1...And you forgot something important: the equation a^2 =1 admits TWO values of a: a=1and a =-1. So, a=1 => a^2=1 goes one way (the opposite isn't true) but all of the others goes both way (mathematical symbol <=>).With a=-1 the thing works.I bet that can be solved by imaginary numbers but I'm too lazy to use them now.Yeah, I'm a math nerd.
You got my vote for RA2 Wizard. Always and forever.
@man manu: 2. not even math really.heres a question:theres an undefined line and a line with the slope zero. they are perpendicular to each other. whats the slope of the undefined line?
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What is the square root of infinity?
Basically, since slope is rise of the line over the run, having a completely vertical line is mathematically impossible from my understanding. The slope would be infinity divided by zero. In a distance over time graph (one measuring speed), such a line would mean that the object is everywhere in the universe at the same time.There is a flaw in the fourth line here. a-1 = (a-1)(a+1) should equal a-1 = a^2-1which is 0=0, not 1=2 :P